Feeding device for machine-tools and the like.



C. A. HIRTH. FEEDING DEVICE FOR MACHINE TOOLS AND THE LIKE. APPLICATIONrum) DEC. 10, 1901'.

909,300, Patented Jan. 12, 1909.

stone d or some other operating part.

such as t e wheel 1.

UNITED STATES PATENT OFFICE.

CARL Al BERT HIlt'IH, ()F CANNSTATT, NEAR S'IU'ITGABT, GERMANY.

FEEDING DEVICE FOR MACHINE-TOOLS AND THE m.

Specification 0t Lettem Patent.

Patented Jan. 12, 1969 Application filed December 10, 1907. Serial No.405,907.

1 on one side with an inclinedsurface l, the

To all whom it may concern:

Be it known that I, CARL ALBERT Hm'rn,

a subject of the Germnr l'hn 'ieror, residing at Uannstatt, nearStuttgart, brrmany, have invented a certain new and us. vul improve"ment in Feeding Devices for Machine-Tools and the Like, of which thefollowing is a specification.

This invention relates to a certain im provement connected with the feeddevices i of machine tools and the like.

In the present feed devices for holders in machine tools it is usual toem ploy a screw spindle with square or taper hreads, the

. rotation of which advances or draws back tools and the like in which areliable adjustment and extreme accuracy are obtained by em ,loying forthe adjustment of the holder sli e a wheel or the like provided withincline surfaces which are brought into contact with a spring orweight-controlled holder or a lug of the same on the one side, and restagainst an abutment or the frame on the other, such abutmentand themovable part being located substantially o posite to each other so thatthe interposed Wheel or the like transmits the ressure of the slide or 3holder dircctly'tot c frame and thus any possibility of bending oryielding of the wheel or the like is obviated.

In the accompanying drawings: One form of the device'is shown in Figurel which is a section of a holder, while F igs. 2 and 3 show amodification in different positions.

Referring to Fig. l: On the casing a is adjustahly mounted the holderslide b which carries a grinding spindle c with a g 'Ii pd ie slide b isconnected, by means of the rope e passing over a pulley f, withtheweight g, under the influenceof which the lug h of the slide is ressed'against an adjustable part This wheel i is mounted in the casing a on astud 1;, and is provided resent invention is aother side being fiat andrestin against an abutment. m on the casing a. whic is situated as isseen near the rim of the wheel. wheel i has gear teeth n on its rim andis operated by a hand wheel 0 and pinion p.

As the adjusting wheel 2' is rotated the holder slide 1) is eitherpushed forward by the inclined surface 1 or forced back by the weight g.In this. way,the entire pressure on the adjusting wheel is taken upl bythe i casing, so that inaccuracies due to t nding or tilting of thewheel are precluded. inaccuracies due to the presence of ale. er of oilin lubricating, are also obviated, ecause when suitable materials areused for the adjusting wheel and parts in contact with same, nolubrication is required.

- The sloping surface of the Wheel can of UQUIISQ be repeated more thanonce in the (II'C adjusting part or wheel. In this case it is in theform of a plate, disk or wheel t bevplaced on a second eled on one sideand plate disk or wheel '8 also inclined on one suracc but plane on theother. The plate or disk 1! which rests with its front inclined surfaceagainst the lug h of the holder, can be rotated on a stud uof the plateor disk 3, and held fast in any desired. position by the nut 12. Theplate or disk 8 is fixed on the shaft k and rests with its rear or planeface against the stop m of the machine frame or" casing. The shaft canbe turned from the gear n. By turning the plate or disk t in relation tothe plate or disk 8, the extent to which the holder will be moved whenthe shaft is is turned canbe regulated at will.

In the position shown in Fig. 2, the incline on the plate or disk tcounteracts the incline on the plate or disk s, and no feed motion isin'ipartcd when the shaft k is turned, In the position shown in Fig. 3,the inclined surfaces of the two plates or disl's act in conjunction,and a hall turn of the ear n/iinarts to the log it the maximun eedstroke,

rom hto the position It shown in dotted lines Fig. 3. Any desiredintermediate stroke between nil and the maximum stroke shown in Fig. 3,can be imparted by relativel ad'usting the plates or disks. at claimis 1. In a machine of the class described,'tbe combination of a' slide,a stationary abut ment, and a cam movable relative to and Figs. 2 and 3show a modification of the slide at a point opposite tea the surfaceofthe said part that bears on the slide being inclined and contactingwith the its point of contact the abutment, for the purpose, de-

scribed. V 3.- In a machine of the class described, the

combination of a slide having on one face a or stud, a stationaryabutment arran%ed in line with said lug, and a cam movab e between andhaving its 0 pcqite faces bearin against said lug and a tment, whereb te thrust of the slide'will e transmitted directly to the abutment anddefamation of the cam preventerh- 4. In a machine of the classdescribed, the

combination of a slide, a stationary abutment, a cam wheel having onesurface engaging the slide near its periphery and its 0 posite surface te same distance from the axis of the Wheel as the point of contactbetween the latter alkahd the slide, and means for turning the wheel.

5. Inimachine of the class described; the combination of a part carryingan inclined surface,means for adjusting such inclined surface on itscarrying part, means for movengaging the abutment at mg said carryingpart, a fixed abutment for such part on one side, and a part ada ted toabut against the inclined surface an to be moved by same, such fixedabutmentbeing located substantially opposite the part to be moved.

6. 111 a machine of the class described, the combination, of a partcarrying an inclined surface and a plane surface, means for moving saidpart, a second art also having an inclined surface and a p ane surface,means for adjustably securing such two parts togather, a fixed abutmentfor the rear face of one of such parts and a part adapted to abutagainst the front surface of the other part and to be moved by same.

7. Inc machine of the class described, the combination of a disk havingan inclined surface and a plane surface, means for moving such disk, :1second disk also having an inclined surface and a plane surface, a studand nut for adjustably securing one .disk to the other, a fixed abutmentfor the rear face of one of such arts, a movable holder and a partcarried by such'holder adapted to abut against the front surface of theother part and to be moved by same.

In testimony whereof I have hereunto set my hand in thepresence of twosubscribing witnesses.

CARL ALBERT BIRTH.

Witnesses OTTO GRAF, GUsTAv STEIN.

